When I attempt to run \"mvn generate-sources\" this is my output :
SLF4J: Failed to load class \"org.slf4j.impl.StaticLoggerBinder\". SLF4J: Defaulting to n
Even though this is bit late response, may be helpful for someone. Look like you have used pluginManagement. If you use pluginManagement , it will not pick the plug-in execution.
It should be under